How to extract text from access log?

Question

I am very new in this. I am trying to extract some text from my access log in a new file.
My log file is like this:

111.111.111.111 - - [02/Jul/2021:18:35:19 +0000] "GET /api/items HTTP/2.0" 304 0 "https://example.com/some/text/call-log?roomNo=5003" "Mozilla etc etc etc etc"
111.111.111.111 - - [02/Jul/2021:20:35:19 +0000] "GET /api/items HTTP/2.0" 304 0 "https://example.com/some/text/resevation-log?roomNo=4003" "Mozilla etc etc etc etc"

I want to extract in below format in a new file.

02/Jul/2021:18:35:19 +0000, call-log, 5003
02/Jul/2021:20:35:19 +0000, resevation-log, 4003

Till now I have managed to do this basic awk command:

awk '{print $4,$5,",",$11}' < /file.log

Which gives me the below output:

[02/Jul/2021:18:35:19 +0000] , "https://example.com/some/text/call-log?roomNo=5003"

Answer 1

$ cat tst.awk
BEGIN {
    FS="[[:space:]]*[][\"][[:space:]]*"
    OFS = ", "
}
{
    n = split($6,f,"[/?=]")
    print $2, f[n-2], f[n]
}

$ awk -f tst.awk file
02/Jul/2021:18:35:19 +0000, call-log, 5003
02/Jul/2021:20:35:19 +0000, resevation-log, 4003

The above uses the following way to split the input in your question into fields using any POSIX awk:

$ cat tst.awk
BEGIN {
    FS="[[:space:]]*[][\"][[:space:]]*"
    OFS = ","
}
{
    print
    for (i=1; i<=NF; i++) {
        print "\t" i, "<" $i ">"
    }
    print "-----"
}

$ awk -f tst.awk file
111.111.111.111 - - [02/Jul/2021:18:35:19 +0000] "GET /api/items HTTP/2.0" 304 0 "https://example.com/some/text/call-log?roomNo=5003" "Mozilla etc etc etc etc"
        1,<111.111.111.111 - ->
        2,<02/Jul/2021:18:35:19 +0000>
        3,<>
        4,<GET /api/items HTTP/2.0>
        5,<304 0>
        6,<https://example.com/some/text/call-log?roomNo=5003>
        7,<>
        8,<Mozilla etc etc etc etc>
        9,<>
-----
111.111.111.111 - - [02/Jul/2021:20:35:19 +0000] "GET /api/items HTTP/2.0" 304 0 "https://example.com/some/text/resevation-log?roomNo=4003" "Mozilla etc etc etc etc"
        1,<111.111.111.111 - ->
        2,<02/Jul/2021:20:35:19 +0000>
        3,<>
        4,<GET /api/items HTTP/2.0>
        5,<304 0>
        6,<https://example.com/some/text/resevation-log?roomNo=4003>
        7,<>
        8,<Mozilla etc etc etc etc>
        9,<>
-----

That would fail if any of your quoted fields can contain [, ], or an escaped ", none of which exist in your example but if they can happen then include them in the example in your question.

Answer 2

This awk can extract the text:

awk -v FS='[][/?="]' -v OFS=',' '{print $2"/"$3"/"$4,$16,$18}' file
02/Jul/2021:18:35:19 +0000,call-log,5003
02/Jul/2021:20:35:19 +0000,resevation-log,4003